Also have a look please. Ive changed test123 class to something like singletone.

And it working without external binding. Why???

Main class:

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"

                                 xmlns:s="library://ns.adobe.com/flex/spark"

                                 xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"

                                 creationComplete="application1_creationCompleteHandler(event)">

<fx:Script>

                    <![CDATA[

                              import mx.events.FlexEvent;

                              protected function application1_creationCompleteHandler(event:FlexEvent):void {

                              }

                              protected function button1_clickHandler(event:MouseEvent):void {

                                        dispatchEvent( new Event("test2"));

                              }

                    ]]>

</fx:Script>

<s:layout>

  <s:VerticalLayout/>

  </s:layout>

          <s:Label text="{test123.getInstance(this).lalala()}"/>

          <s:Button click="button1_clickHandler(event)"/>

</s:Application>

test123 class:

package {

          import flash.events.Event;

          import flash.events.EventDispatcher;

          import mx.binding.utils.BindingUtils;

          public class test123 extends EventDispatcher{

          private var text:String ;

          private static var instance:test123 = null;

          public static function getInstance(obj:EventDispatcher):test123{

                    if (!instance) instance = new test123(obj);

                    return instance

          }

                    public function test123(obj:EventDispatcher){

                              obj.addEventListener("test2",ontest2);

                    }

          [Bindable(event = "test1")]

          public function lalala():String {

                              return text;

          }

                    protected function ontest2(event:Event):void {

                              text = "fdsfadsf";

                              dispatchEvent(new Event("test1"));

                    }

          }

}

Why it working now?

The main problem - Ive the same code with singletone in my live application. And sometimes lalala is not fired update. And i dont know why???

Thanks for explanations. Seems good for me.

I started with this investigation once faced binding issue in my code. Can you have a look?

1 Ive callback from server

                              public function onUserStateChanged(userId:Number,state:int) :void{

                                        Cc.log(" *** onUserStateChanged "+userId+","+state);

                                        CommonModel.getInstance().messageTarget.dispatchEvent(new DynamicEvent(Events.USER_STATE_CHANGED, false, false, [userId,state]));

                              }

2 This messages is accepted in my signletone

addEventListener("refreshUserState",onTest);

CommonModel.getInstance().messageTarget.addEventListener(Events.USER_S TATE_CHANGED,onUserStateChanged);

and then in code:

                    public function onUserStateChanged(event:DynamicEvent):void{

                              var userId:Number = event.eventData[0];

                              var state:Number = event.eventData[1];

                              var user:Object = findUserById(usersInCurrentConference,userId);

                              if (!user){

                                        Cc.log(" !!! User not found while on user state changing for user "+userId+" !!!");

  return;

                              }

                                        user.state = state;

                                        dispatchEvent(new Event("refreshUserState"));

                    }

In this class i ve also two additional methods:

                    private function onTest(event:Event):void{

  trace ("fasdfasdf");

                    }

and

                    [Bindable (event = "refreshUserState")]

                    public function isUserDisconnected(user:Object):Boolean{

                              if (!user) return false;

                              return user.state == User.STATUS_DISCONNECTED;

                    }

3 From external code ( list renderer ) which created after first access to singletone

          <s:BorderContainer id="disconnectedMessageContainer" left="1" top="1" right="1" bottom="1" visible="{UserHelper.getInstance().isUserDisconnected(data)}" backgroundAlpha="0.6" backgroundColor="0x000000"

                                                     mouseChildren="false">

                    <s:HGroup width="100%" height="100%" horizontalAlign="center" verticalAlign="middle">

                              <s:Label color="0xffffff" text = "DISCONNECTED" fontWeight="bold"/>

  </s:HGroup>

</s:BorderContainer>

And what i see. When calback comes onTest function fires with no problems. also in debug i see that  refreshUserState fires also but disconnectedMessageContainer not refreshes. i can see in debug any requat to isUserDisconnected function.

What does it mean? Can you help and advise?